(;AB[cs]AB[cr]AB[cq]AB[dq]AB[do]AB[co]AB[ep]AB[fp]AB[en]AB[fn]AB[gn]AB[hn]AB[in]AB[io]AB[ip]AB[iq]AB[ir]AB[is]AW[ds]AW[dr]AW[eq]AW[fr]AW[eo]AW[fo]AW[go]AW[ho]AW[hp]AW[hq]AW[hr]AW[hs]AB[bp]AW[dp]C[Black to kill]AP[goproblems]
(;B[fs]
(;W[er]C[CHOICE]
(;B[cp];W[fq]C[]
(;B[dp];W[gp]
(;B[gr]C[RIGHT])
(;B[gs];W[gr]))
(;B[gr];W[gs])
(;B[gs];W[gp]
(;B[gr];W[dp]C[seki])
(;B[dp]))
(;B[gp];W[gq]
(;B[gs];W[dp])
(;B[dp];W[gs]))
(;B[gq];W[gr]))
(;B[fq];W[gq]
(;B[gs];W[gp])
(;B[cp];W[gs]))
(;B[gq];W[fq]
(;B[gr];W[gp])
(;B[cp]))
(;B[gr];W[fq]
(;B[cp])
(;B[gq])
(;B[gs];W[gp]C[seki]))
(;B[gs];W[fq]
(;B[cp])
(;B[gr])
(;B[gp];W[gq])))
(;W[gs];B[fq]
(;W[es];B[gq]C[RIGHT])
(;W[er];B[gq]C[RIGHT]))
(;W[fq];B[er];W[gp];B[ep]C[RIGHT]))
(;B[fq];W[er]
(;B[fs])
(;B[cp];W[fs])
(;B[gr];W[gq])
(;B[gs];W[fs])
(;B[gq];W[gr]))
(;B[er];W[es]
(;B[fq];W[gq]C[ko is not a solution]
(;B[er]C[NOTTHIS])
(;B[cp];W[gs]C[ko])
(;B[gs];W[gp]))
(;B[gq];W[fq]))
(;B[es];W[er]
(;B[gq];W[fq]
(;B[gr];W[gp])
(;B[fs];W[gr]))
(;B[fq];W[gq])
(;B[cp];W[fs])
(;B[fs];W[fq]
(;B[cp];W[gp])
(;B[gq])
(;B[gr];W[gs]))
(;B[gr];W[gq]))
(;B[cp];W[fq]
(;B[fs];W[gs])
(;B[es];W[er])
(;B[dp];W[es]))
(;B[gr];W[fq]
(;B[fs];W[gs])
(;B[gq];W[gs])
(;B[es];W[er]
(;B[gq])
(;B[fs])
(;B[cp])))
(;B[gp];W[fq])
(;B[gq];W[fq])
(;B[gs];W[fq]
(;B[es];W[er];B[fs];W[gr])
(;B[fs];W[gr])))